Rotary pump



Nov. 13, 1951 c, M, ZOLL 2,575,154

ROTARY PUMP Original Filed June 19, 1945 3 Sheets-Sheet 1 C. M. ZOLLROTARY PUMP Nov. 13, 195

3 Sheet s-Sheet 2 Original Filed June 19, 1945 C. Z 0AA Patented Nov.13, 1951 UNITED STATES PATENT OFFICE ROTARY PUMIP Carl Michael Zoll, NewOrleans, La., assignor to Hydro Power, Inc., New Orleans, La., acorporation of Louisiana Substituted for abandoned application SerialNo.

600,305, June 19, 1945. This application December 18, 1950, Serial No.201,503

pump cylinders and a common outlet from all of said pump cylinders.

The third important object of the invention is to provide a novel deviceof this kind which may be driven from a motor and either directlyconnected to the housing of the motor or to a reduction gear housingdriven in turn by the motor.

With the above and other objects in view the invention consists ingeneral of certain novel details of the construction and combinations ofparts hereinafter fully described, illustrated in the accompanyingdrawings, and particularly claimed.

In the accompanying drawings, like characters or reference indicate likeparts in the several views and:

Fig. 1 is a side elevation of the invention.

Fig. 2 is a detail section on the line 22 of Fig. 3, the view beingpartly diagrammatic.

Fig. 3 is a section taken substantially on the line 3-3 of Fig. 2 butextending through the entire device.

Fig. 4 is a section on the line 4-4 of Fig. 3.

In the embodiment of the invention herein disclosed there is provided ahousing I!) having a circular body portion ll wherein are formed thepump cylinders l2 of the ordinary shape. These pump cylinders arearranged in equidistances around the center of the circular body I I andare equally spaced around the lower part thereof. Leading outwardly fromeach of the pump cylinders are intake ports and surrounding the variousintake ports is a manifold l4 having a supply inlet l5 provided with asuitable flange l6 by means of which it may be connected to any sourceof supply. Centrally of the body H is an outlet passage Il extendingthrough a boss l8 which may be used for connection of an outlet pipe tocarry thefiuid from the pumps to any desired place. Ports l9 radiatefrom this outlet I1 to the various cylinders l2, these ports beingcurved to render outflow easy.

In each of the cylinders there is provided a pair of pump elements ofthe usual interlocking form so that when these pump elements arerevolved they force the fluid being pumped through the cylinders. Thepump cylinders open to the rear of the body I i so that these elements20 may be inserted therein but a closure 2! is fitted in a circularrecess 22 and engages on a gasket 23 which seals the inner ends of thepump cylinders. Each pump element is provided with a shaft 24 whichextends through the member 2| into a hollow circular housing 25. Whileno means has been shown in the present drawings it is to be understoodthat any suitable packing may be used in connection with the shaft 24 toprevent any leakage. at this point. Such packings are, however, wellknown, and it is not deemed necessary here to describe the same. Keyedor otherwise secured to the shafts 24 are gears 26 which mesh with eachother and consequently causes the elements 20 to revolve in unison. Itwill be observed from Fig. 2 that there are a number of groups ofgearings and that in each group one of the shafts 24 has keyed orotherwise secured thereto a gear 2! which meshes with a gear 28 fixed ona centrally disposed shaft 29 which extends through housing and througha flange member 30 which may be welded or otherwise secured to thehousing 23 for the purpose of supporting entire device. Obviously othermeans of support may be used but this has been here illustrated as oneconvenient manner of supporting directlyon either a slowly rotatingmotor or on a reduction gear housing driven by a motor.

In operation the fluid enters through the passage I5 and is distributedby the manifold M to the various ports l3 from which the pumps drive itthrough to the central discharge openings [1.

While only five pump cylinders have been here shown it is obvious thatany desired number may be used, the entire matter depending on thediameter of the body II and the size of the cylinders.

What is claimed is:

1. In rotary pumping mechanism, a housing having a body portion andhaving a series of pump chambers spaced concentrically about the axis ofsaid body portion, an intake port at the bottom of said housing, a pairof arcuate passages within said housing, said passages extending inopposite directions from said intake port, said passages tapering fromthe said intake port in cross section whereby to obtain uniform suctionin the pump chambers, said passages having port communication with saidpump chambers, said housing having an outlet axially positioned withreference to said body portion, said housing having passages extendingradially of said body portion from the pump chambers to said outlet,pumping elements in said chambers, and means to drive said pumpingelements.

2. In rotary pumping mechanism, a housing having a body portion andhaving a series of pump chambers spaced concentrically about the axis ofsaid body portion, an intake port at the bottom of said housing, a pairof arcuate passages within said housing, said passages extending in 10opposite directions from said intake port, said passages tapering fromthe said intake port in cross section whereby to obtain uniform suctionin the pump chambers, said passages having port communication with saidpump chambers, said housing having an outlet axially positioned withreference to said body portion, said housing having passages extendingradially of said body portion from the pump chambers to said outlet,said radial passages having their inner ends curved in the direction offlow from said outlet whereby to avoid turbulence in the outlet, pumpingelements in said chambers, and means to drive said pumping elements.

CARL MICHAEL ZOLL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,138,093 Feldbush et a1 Nov. 29,1938 2,185,338 Hassler Jan. 2, 1940 2,481,047 Sloane n Sept. 6, 1949FOREIGN PATENTS Number Country Date 485,488 Great Britain May 20, 1938624,177 France Mar. 29, 1927 696,069 Germany Sept. 26, 1940 846,828

France June 19, 1939

